com.gloopics.g3viewer.client.canvas.Factory.java Source code

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Here is the source code for com.gloopics.g3viewer.client.canvas.Factory.java

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/*
 * Copyright 2008 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.gloopics.g3viewer.client.canvas;

import com.google.gwt.core.client.JavaScriptObject;

/**
 * Factory class used to create all other Gears objects.
 */
public final class Factory extends JavaScriptObject {
    /**
     * String used to request a BlobBuilder instance from Gears.
     */
    public static final String BLOBBUILDER = "beta.blobbuilder";

    /**
     * String used to request a Canvas instance from Gears.
     */
    public static final String CANVAS = "beta.canvas";

    /**
     * Returns the singleton instance of the Factory class or <code>null</code>
     * if Gears is not installed or accessible.
     * 
     * @return singleton instance of the Factory class or <code>null</code> if
     *         Gears is not installed or accessible
     */
    public static native Factory getInstance() /*-{
                                               return $wnd.google && $wnd.google.gears && $wnd.google.gears.factory;
                                               }-*/;

    protected Factory() {
        // Required for overlay types
    }

    /**
     * Creates a new {@link Canvas} instance.
     *
     * @return a new {@link Canvas} instance
     */
    public Canvas createCanvas() {
        return create(CANVAS);
    }

    /**
     * Creates an instance of the specified Gears object.
     * 
     * @param <T> Gears object type to return
     * @param className name of the object to create
     * @return an instance of the specified Gears object
     */
    private native <T extends JavaScriptObject> T create(String className) /*-{
                                                                           return this.create(className);
                                                                           }-*/;
}